Chathura Karunanayaka

When I start the fb 15 car, it behaves in this way. Changing to "D" and "1"mode -car does not start to move at the first time. But "R" AND "2" is working without problem . But after around 10 minutes when i change the gear into D mode car starts to move, but with a little bump. But during a travel this is not happned. When the car is in P mode or N mode and accelerate to 7-8 RPM, car starts to jolt and engine sound fluctuates. Please help with this and let me know if u have any idea with this